How to play

• Circle ○ and Cross ✕ take turns placing 8 marks each on the 10×10 board.
• Once setup ends, each turn you choose a direction — ↑ ↓ ← →.
• Every one of your marks with a free square in that direction expands by one — all at once, simultaneously.
• If none of your marks can expand in any direction, you must pass.
• When both players pass in a row, the game is over. Most marks wins!